HONOLULU (AP) - A Marine smiles as he holds what appears to be a puppy by the scruff of the neck. The face of the motionless animal is shown to the camera as a colleague comments on how cute it is.Then the black and white puppy is tossed off a rocky cliff.Whether the 17-second Internet video clip is authentic or a prank, it has drawn sharp condemnation, widespread outrage and a military investigation.Animal rights groups said they have been flooded with e-mails and calls about the disturbing video, which was viewed tens of thousands of times before it was taken …